lookout

nouns

a person employed to keep watch for some anticipated event
lookout, lookout man, picket, scout, sentinel, sentry, spotter, watch
is derived from
look out
an elevated post affording a wide view
lookout, observation post
is derived from
look out
a structure commanding a wide view of its surroundings
lookout, lookout station, observation tower, observatory
is derived from
look out
the act of looking out
lookout, outlook
is derived from
look out